About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Discovery and Insertion of Next Generation Structural Materials
|
| Presentation Title |
Hydrogen Embrittlement Behavior of Ni-Based Alloy Fabricated by Laser-Powder Bed Fusion |
| Author(s) |
Ozkan Gokcekaya, Takayoshi Nakano |
| On-Site Speaker (Planned) |
Ozkan Gokcekaya |
| Abstract Scope |
Ni-based alloys are materials that combine high temperature properties, corrosion resistance, and excellent mechanical properties. However, there is concern about the deterioration of their functionality due to hydrogen embrittlement (HE) in a H environment. Laser-Powder Bed Fusion (L-PBF) process develops unique microstructure owing to fast cooling rate. By altering laser conditions, the shape of the solid-liquid interface and heat flow direction in the melt pool can be altered. This enables crystallographic texture control and results in different microstructural characteristics. The behavior of HE changes with the state of the microstructure, such as lattice defects that have an affinity for H diffusion, therefore it is proposed that HE can be suppressed by controlling the microstructure that contributes to H diffusion and trap site by preventing the localization of hydrogen. Hence, L-PBF has the potential to suppress HE by utilizing changes in microstructural characteristics. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Sustainability, Mechanical Properties |